https://github.com/noloader/android-prng

Sample Android shared object which depends on Crypto++ library shared object.
https://github.com/noloader/android-prng

Last synced: about 16 hours ago
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Sample Android shared object which depends on Crypto++ library shared object.

• Host: GitHub
• URL: https://github.com/noloader/android-prng
• Owner: noloader
• Created: 2015-12-08T22:24:17.000Z (almost 9 years ago)
• Default Branch: master
• Last Pushed: 2021-02-06T21:58:42.000Z (almost 4 years ago)
• Last Synced: 2023-02-27T00:56:27.872Z (over 1 year ago)
• Language: C++
• Homepage:
• Size: 93.8 KB
• Stars: 16
• Watchers: 2
• Forks: 7
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
Android-PRNG is a sample Android NDK project to demonstrate two topics. First, it shows you how to compile a shared object using the Crypto++ library on Android. Second, it shows you how to sample sensors to accumulate seed data to use with a software based random number generator.

The project requires the Crypto++ library built for Android with architectures armeabi-v7a, arm64-v8a, x64 and x86_64. The project looks for them in the following locations based on architecture:

 * /usr/local/cryptopp/android-armeabi-v7a

 * /usr/local/cryptopp/android-arm64-v8a

 * /usr/local/cryptopp/android-x86

 * /usr/local/cryptopp/android-x86_64

You can create the prerequisites by repeatedly building and installing the Crypto++ library. The steps for the task are:

```bash

git clone https://github.com/weidai11/cryptopp.git

cd cryptopp

cp -p TestScripts/setenv-android.sh .

source ./setenv-android.sh armeabi-v7a

make -f GNUmakefile-cross distclean

make -f GNUmakefile-cross static dynamic

sudo make install PREFIX=/usr/local/cryptopp/android-armeabi-v7a

```

Lather, rinse, and repeat for each architecture.

Once you have the libraries installed, use `ndk-build` to build the library:

```bash

cd Android-PRNG

ndk-build

```

After the native libraries are built, use `ant` to build the APK and install it on a device:

```bash

ant debug install

```

Once installed, you should find it in the App Launcher.

### References

The following references from the Crypto++ wiki should be helpful.

* http://www.cryptopp.com/wiki/Android_(Command_Line)

* http://www.cryptopp.com/wiki/Android.mk_(Command_Line)

* http://www.cryptopp.com/wiki/Android_Activity

* http://www.cryptopp.com/wiki/Wrapper_DLL